Is that a trick question?
If you have water with you, there is no need to go find any. Personally, and I don't think I'm alone on this, I need water. Dehydration is not fun.
While it could be some sugary carbonated liquid rather than water carried, I prefer water. Apparently, others do too. The type and 'pedigree' of water is always something to question, but having water with you? Yes. I also always carry a pocket knife.
I'm a boy scout leader, so being prepared is part of my life. I carry a one liter playtpus water bottle with me every day to work because the water there tastes bad. However, most people bring bottled water. I also like to keep water in my vehicle along with a first aid kit. It's part of being prepared, self sufficent, as well as a time saver. Mankind has been doing this for millennia, disposable polyethelyene bottles just make having water with you easier and more convenient.
Regards,
Malta